Great Northern?
by Ransome, Arthur
pub. by J. B. Lippincott Co. - 1947     isbn _
The Swallows, the Amazon and the two Callums), travel to the far north - the Outer Hebrides Islands north of Scotland. They attempt to foil an egg collector from raiding the nest of a rare bird.
This is traditionally considered the last book of the Swallows and Amazons series which Arthur Ransome wrote.

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